Arctoolbox/Analysis Tools/Extract/Clip

Nada. Give you guys a chance to work on your projects or to enjoy the seasonably breezy 105 degree temperature and also for me to catch up with grading assignments so you guys quit hassling me.

Slope & GAT & How to Save

Slope is calculated in ArcMap using elevation data. It is calculated using the Spatial Analyst Extension.

• First, ensure you have elevation data for your region. The higher your elevation precision, the higher your resulting slope precision will be.
• Here is a direct link to TNRIS' Arlington NED (30 meter)
• Second, ensure the Spatial Analyst extension is turned on. (Customize/Extensions)
  
• Third, ensure your XY coordinates are in the same units as your Z units. (We are fine for this example, just want to point it out
  
• Fourth, ArcToolbox/Spatial Analyst/Surface/Slope

Geologic Atlas of Texas

• Download from TNRIS
• Use the collarless version for displaying purposes. Use the collared version for the legend information.

How to Save

• File/Map Document Properties and you will see the checkbox for relative path names.

Items Still to Cover

• Simple Site Selection Logic (intersects, union, merge, erase)
• Maps for Presentations (pretty maps)
• Georeferencing & Digitizing
• ArcGIS Online
  

Only necessary in two situations:

1. A file you obtained does not have its coordinate systems defined
2. A file has the wrong coordinate system (usually due to a mistake) RARE

A layer's source tab (in properties) will provide the reference and coordinate system information.

If a layer is undefined, you must first identify what the data creator's intended.

Arctoolbox/Data Management Tools/Projections and Transformations/Define Projection

First, no papers required.

Second, nothing to turn in whatsoever.

Third, everyone will give a 5-minute presentation relying only on PowerPoint.

Calculate the distance in meters from all the volcanoes in the U.S. to the UT Arlington Geosciences Building. After calculating the distance, change the symbology to show these distances using 10 equal interval classes. Turn in the range of the smallest (closest) class.

• Obtain the volcano data from the National Atlas.
  
• Use the U.S. National Atlas Equal Area projection system (Predefined/Projected/Continental/North America/U.S. National Atlas Equal Area)
• No WinZip, WinRar, or equivalent on your computer to open the .TAR files from National Atlas? Download Peazip. Is free, safe, and can even be run as a portable app from a USB drive.

If you get a sample size exceeded error message when changing the symbology, don't panic. The default sampple size is 10,000 and this can be increased to accommodate. Click the 'Classify' button and then click the 'Sampling...' button and increase the sample size to exceed the number of unique values in your feature class.

After today, we covered everything for Buffer Projects except for GAT

First, we will take a look at the Buffer Project structure

New Data Sources:

1. National Atlas
1. No WinZip, WinRar, or equivalent on your computer to open the .TAR files from National Atlas? Download Peazip. Is free, safe, and can even be run as a portable app from a USB drive.
2. Texas Park and Wildlife Division

Proximity Calculations:

1. Near (ArcToolbox/Analysis Tools/Proximity/Near)
2. Point Distance (ArcToolbox/Analysis Tools/Proximity/Point Distance)

Proximity Exercise:

• Take this table (download table) and calculate the straight-line distance from each location to UT Arlington Library.
• To create the UT Arlington Library point, first ensure you have the Bing aerials viewed. (File/ArcGIS Online, search for Bing). Second, geocode as we normally do to the University address and then move the point to the Library. Third, convert the graphic to a feature class.
• We can use either the Near or the Point Distance tool for this exercise.

Calculate Slope:

• We will use the Spatial Analyst Extension. The extension needs to be enabled before we can use it.
• Customize/Extensions and check Spatial Analyst
  
• ArcToolbox/Spatial Analyst Tools/Surface/Slope

Example of what to turn in: https://mavspace.uta.edu:443/been/public/bufferProject.zip

• One database and a folder for your raster files.
• Database will have 11 feature classes
• Raster folder will have 6 raster files.
• Do not turn in temporary files
• Neat and well organized

________________________

Each student will create a personal geodatabase containing the following data for both a 5-mile and 1-mile radius:
• Total population (2000) - SimplyMap
• % population change (2000 – 2010) - SimplyMap
• Median household income (1999) - SimplyMap
• % income change (1999 – 2009) - SimplyMap
• % adults who earned a bachelor degree (2000) - SimplyMap
• % adults with bachelor degree change (2000 – 2010) - SimplyMap
• Total renting households (2000) - SimplyMap
• % renting households change (2000 – 2010) - SimplyMap
• Total crime index (2010) - SimplyMap
• Rain (inches) - SimplyMap
• Snow (inches) - SimplyMap
• Distance to closest water body (feet)
• Distance to UT Arlington Geosciences building

The following data must be obtained only within a 5-mile radius:
• Aerial data (most current) - CRGSC (2005 NAIP 2m True Color )
• 30m Elevation data (USGS DEM) - TNRIS
• Slope (derived from USGS DEM)
• Digital Raster Graphic (USGS topographic map) - TNRIS
• Geologic map (from Geologic Atlas of Texas)
• Landsat 7 ETM+ Image (2003, or latest year) - CRGSC
• Texas Water Wells - TWDB
• Italian Restaurants - ReferenceUSA
• Surface quality monitoring stations - TCEQ
• Toxic Release Inventory Data (latest available) - EPA

The following data must be obtained only within a 20-mile radius:
• Vegetation (1:1,000,000 scale) - TPWD
• River Basins (1:1,000,000 scale) - TPWD
• Earthquakes (if any) between 1568 – 2004 - National Atlas
• Seismic Hazard - National Atlas

Wow, grades are wonderful for the most part.

Mean Grade: 89.5

Nine Perfect Exams (out of 17)!

_____

Make Up Opportunity

• Anyone with a score under 90% can earn additional points to bump up their exam grade. Turn in, by Thursday, your exam that I emailed to you with corrected answers and you will receive .5 credit. For example, if you earned a 70 and redid the 3 answers you got wrong, your grade would bump up to a 85.